Test Index

UPSC NDA I 2024 Mathematics Paper

Question Numbers: 117-118

Consider the following for the items that follow :

$x_{i}$	1	2	3	...	$n$
$f_{i}$	1	$2^{-1}$	$2^{-2}$	...	$2^{-(n-1)}$

Question : 117 of 120

Marks: +1, -0

What is

\sum_i^n x_i f_i

equal to ?

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